array_freq.c

    #include <stdio.h>    
         
    int main()    
    {    
        //Initialize array     
        int arr[] = {1, 2, 8, 3, 2, 2, 2, 5, 1};     
            
        //Calculate length of array arr    
        int length = sizeof(arr)/sizeof(arr[0]);    
            
        //Array fr will store frequencies of element    
        int fr[length];    
        int visited = -1;    
            
        for(int i = 0; i < length; i++){    
            int count = 1;    
            for(int j = i+1; j < length; j++){    
                if(arr[i] == arr[j]){    
                    count++;    
                    //To avoid counting same element again    
                    fr[j] = visited;    
                }    
            }    
            if(fr[i] != visited)    
                fr[i] = count;    
        }    
            
        //Displays the frequency of each element present in array    
        printf("---------------------\n");    
        printf(" Element | Frequency\n");    
        printf("---------------------\n");    
        for(int i = 0; i < length; i++){    
            if(fr[i] != visited){    
                printf("    %d", arr[i]);    
                printf("    |  ");    
                printf("  %d\n", fr[i]);    
            }    
        }    
        printf("---------------------\n");    
        return 0;    
    }